NAT Makes Your Operations More Effective

| Kyle Carreau

This is the first part of our blog series on important acronyms (Part 2: DHCP, Part 3: HMI and SCADA, Part 4: CPwE, Part 5: REP or DLR)

Network Address Translation NAT

Network Address Translation (NAT)

NAT brings value to both OEMs and manufacturers of all kinds. Simply put, NAT is a feature that takes one IP address (typically a Public 10.10.10.X) and converts it to a private IP address (192.168.1.X). The configuration is as easy as filling out a small table (Figure 1). By using this feature, the IP Address convention can be THE SAME for all of your machines on the private/machine level, while maintaining a completely separate IP Address on the public plant network. See Figure 1 for more information.

NAT Mapping Industrial Networking

Figure 1 © Rockwell Automation®

The Real-World Importance of NAT

So how does this help OEMs and manufacturers? From an OEM standpoint, you can set the IP addresses of the PLC, Drives, Distributed IO, etc. however you want; simply fill out the Public side of the NAT table with the IP addresses that your customer has provided you. This also means that if your customer needs to change the IP addresses of the devices on your machine, no longer will you need to go to each device and manually change them; edit the public side of the NAT table and call it day!

From a Manufacturer’s point of view, NAT is a great way to “hide” certain parts of a machine from the plant network. In other words, by using one entry in the NAT table, only the PLC will be visible on the plant network and not the other devices on the machine. This is a great way to easily collect data from a PLC without having to reconfigure multiple IP addresses.

The Network Address Translation feature can be found in certain models of the Stratix® 5700 as well as the 1783-NATR device. Those links will open PDF files allowing you to see exact hardware specifications like the number of ports, CIP compatibility, and NAT compatibility.

Need help decoding all of the acronyms? Contact us today!

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